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Title: Local epitaxial growth of CuO films on MgO
Authors: Catana, A ×
Locquet, Jean-Pierre
Paik, SM
Schuller, IK #
Issue Date: 1992
Publisher: AMERICAN PHYSICAL SOC
Series Title: Physical review. B, Condensed matter vol:46 issue:23 pages:15477-15483
Conference: date:UNIV CALIF SAN DIEGO,DEPT PHYS 0319,LA JOLLA,CA 92093; UNIV GENEVA,DEPT PHYS MAT CONDENSEE,CH-1211 GENEVA,SWITZERLAND
Abstract: We have investigated the structure of molecular-beam-epitaxy-grown CuO thin films on MgO substrates using reflection high-energy electron diffraction, x-ray diffraction, and high-resolution electron microscopy (HREM). The results show that CuO(111) planes grow parallel to (001)MgO planes. Three main in-plane epitaxial relations are observed: [110BAR]CuO\\[110]MgO, [011BAR]CuO\\[110]MgO, and [101BAR]CuO\\[100]MgO. Close to the interface, strains related to the matching conditions imposed by the substrate affect both symmetry and lattice constants of the monoclinic CuO structure. Cross-sectional HREM shows that the exact epitaxial orientation is only partially preserved as the film thickness increases. The loss of in-plane epitaxy is affected by a poor matching of lattice spacings and by misorientations between planes of both crystals, which join at the interface. We investigate the relative orientations between both crystals on the basis of a mapping technique developed for the epitaxy of the axial-commensurate system. The results show that all the experimentally observed epitaxial orientations are successfully predicted by this technique.
ISSN: 0163-1829
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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